Glass-tank-furnace construction



June 3, 1930. J. L. DRAKE GLASS TANK FURNACE CONSTRUCTIQN Filed March 15, 1926 attozncq Patented June 3,' 1930 UNITED STATES PATENT OFFICE JOHN I. DRAKE, OI' TOLEDO, OHIO, ASSIGNOR TO LBBEY-OWENS (i'rLASS COMPANY, OF

' TOLEDO, OHIO, A CORPORATION OF OHIO GLASS-jTANK-FURNACE ONSTRIICTION Application filed March 15, 1926. Serial No. 94,723.

The present invention relates to glass apparatus, and has` particular reference to an 10 vention is to' provide means between the drawin chamber and cooling chamber of a sheet g ass apparatus which will separate the heated atmosphere in said 'chambers A still further object is to providemeansv for use between the drawing'chamber and cooling chamber of a glass apparatus that will sa'feguard the atmospher'e inthe cooling chamber from fluctuations of the atmosphere in the drawing chamber, and vice-versa.

Other objects and advantages of the invention will become apparent during the course of the following description.

In the drawings wherein like numerals are employed to desgnate like parts throughout the same, i

Fig. 1 is afragmental verticallongitudinal section through'a glass apparatus, showing my invention in operative position, an

Fig. 2 is' a section taken on line 2-2 in F ig. 1.

In the drawings the numeral 5 designates a cooling chamber which is arranged in open communication with a tank furnace.

The drawing chamber 7 is arranged in open communication with the cooling cham .ber 5 and includes a draw-pot 8 su ported upon stools or the'like 9, connection etween the pot 8 and the cooling chamber being had 'by means of a so-called goose-neck 10. A sheet 11 may be drawn from a mass of glass 12 contained in the draw-pot 8, as is well understood in the art. The apparatus here described is similar to the Construction shown. in the Colburn Patent No. 1,248,809, granted Dec. 4, 1917, but it is to be understood that the invention is not necessarily limited thereto.

Arranged approximately at the juncture of the cooling chamber 5 and drawing chamber 7 is a jack-arch 13 formed from a plu rality of'sections 14. The jack-arch, in additionto forming a partition, also assists in supporting the lip-tile 15.

As is shown in Fig. 1, the lower surface 16 of the jack-arch is arranged relatively'far away from the surface of the molten glass thereunder. u If the surface 16 is positioned much closer, the joints between the sectionscl t will afi'ect the molten glass. In the production of sheet glass the temperature conditions of the source of supply must be substantially uniform or troubles will be' had with the sheet. In Fig. 2, it is seen that the jack-arch 13 co'mprises 'a great number of blocks forming a correspondingly great number of joints. These joints, if positioned closely adjacent the surface of the glass, have a tendency to cause what is known in 'the art as cold streaks, which result in the formation of a sheet having thick and thin portions.

Although it is not satisfactory to locate the lower broken surface 16 'of the jack-arch closely adjacent the surface of the molten eis glass, it is desirable to separate the atmosv pheres in the coolingchamber and drawing chamber. u

The present invention' relates to a device arranged close to the surface of the -glass, the lower surface of said device nay also be called a jack-arch and being free from all joints. This device comprises a body portion 17 which includes a preferably netallic pipe or the like 18 through which a suitable temperature control medium may be circulated. The body portion 17 is su ported b the side walls of the cooling cham er. A plirality of link portions 19 are Suspended from the pipe 18, the links supporting a rod 20 bein' associated with a one-piece refractory sla 21. The slab 21 is preferably formed from a refractory clay, and as it is supported by the links engaging the rod'20, it ma be positioned closely ad acent the surface o the molten glass passing thereunder. This slab' will prevent any appreciable passage of atmosphere above the glass in either direction so that the desired temperatures can be obtaind in both the cooling chamber and drawing chamber without eiiect upon one another.

If it is desired, the body portion 17 may be adjustably mounted so that the position of the slab can be Varied" or the slab itself can be so mounted. In addition, the same sort of device can be used at the' entrance of the cooling chamber to separate the atmosphere in said cooling chamber -from the atmosphere in p the tank furnace.

It is to be understood that the form of the invention herewith shown and described is to be taken asthe preferred embodiment of the same, and that various changes in the shape,

size and arrangement of parts may be resorted to without departing from the spirit of the invention or the scope of the subj oined claims.

Claims:

1. A jack-archconstruction comprising a.

body portion adapted to be rigidly mounted in a glass furnace, link members carried by the body, and a` slab supported by said links. 2. A jack-&reh construction comprising a body portion adapted to be rigidly mounted in a glass furnace, link members carried by the bod and a one-piece slab Suspended by said lin s.

3. In glass apparatus, a jack-arab, and a. second iack-arch independent of but adjacent to the rst jack-arch, said second mentioned jack-arch comprising a body portion, and a slab carried thereby. r

- 4. In glass apparatus, a jack-arch, and a second 'uck-:rreh 'independent of but adjacent to the rst jack-arch, said second mentioned jack-arch comprisng a fixed body portion, and a slab carried thereby and Suspended thereben'eath.

5. In glass apparatus, a jack-arch, and a i second j ack-arch independent of but adjacent to the first jack arch, said second mentioned jack-arch comprising a body portion, means for rigidly securing the body portion in position, and a one piece slab Suspended from said body portion.

6. Ajack-arch Construction for use in glass fu'naces, comp'ising a, fixed body portion, and a slab ca'ried thereby and Suspended therebeneath.

Signed at Toledo, in the County of Lucas, and State of Ohio, this 12th day of March,

JOHN L. DRAKE.

CERTIFICATE OF CORRECTION.

Potem No.. i, %L 197.. Granted June 3, 1930, to

JOHN L. DRAKI'L lt is herehy Certified thaterror appears in the printed specification of the l ovehumbered patent requiring correction` as iollows: Page l, lines 79 and 80, i strike out the .words "may also be called a-jack-arch and" and insert the same to ollow aiter the word "device" in lirie 81;` and that the said Letters Patent should he read with this correction therein that the same may coform to the record of tlecase in the Patent Office.

v Signed and sealed this 22nd day of July, A. D. 1930.

Win. A. Kinnan,

(Sehl) Acting Commissioner of Patents; 

